From 679d89d6c8cf89b80516dc08dd631f1dbe5683f5 Mon Sep 17 00:00:00 2001
From: Petr Baudis <pasky@ucw.cz>
Date: Fri, 6 Nov 2009 16:40:50 +0100
Subject: [PATCH] Support for commit notifications in mirrored repos

---
 TODO           |  2 --
 jobd/update.sh | 25 +++++++++++++++++++++++++
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/TODO b/TODO
index 8b76cfb..f3c8959 100644
--- a/TODO
+++ b/TODO
@@ -1,5 +1,3 @@
-* Support for commit notifications in mirrored repos
-
 * Watches support - random strangers can ask to be notified each time
   a certain project[#branch]:path changes; c.f.
 
diff --git a/jobd/update.sh b/jobd/update.sh
index b44499d..d54c78e 100755
--- a/jobd/update.sh
+++ b/jobd/update.sh
@@ -20,6 +20,8 @@ bang_action="update"
 url="$(config_get baseurl)"
 mail="$(config_get owner)"
 
+bang git for-each-ref --format '%(refname)	%(objectname)' >.refs-before
+
 case "$url" in
 	svn://*)
 		GIT_DIR=. bang git svn fetch
@@ -34,6 +36,29 @@ esac
 bang git update-server-info
 bang config_set lastrefresh "$(date -R)"
 
+# Look at which refs changed and trigger ref-change for these
+bang git for-each-ref --format '%(refname)	%(objectname)' >.refs-after
+sockpath="$cfg_chroot/etc/taskd.socket"
+if [ -S "$sockpath" ] && ! cmp -s .refs-before .refs-after; then
+	{
+	join -j 1 .refs-before .refs-after |
+		while read ref old new; do
+			[ $old = $new ] && continue;
+			echo "ref-change -1 $proj $ref $old $new"
+		done
+	join -j 1 -v 1 .refs-before .refs-after |
+		while read ref old; do
+			echo "ref-change -1 $proj $ref $old 0000000000000000000000000000000000000000"
+		done
+	join -j 1 -v 2 .refs-before .refs-after |
+		while read ref new; do
+			echo "ref-change -1 $proj $ref 0000000000000000000000000000000000000000 $old"
+		done
+	} | nc.openbsd -w 1 -U "$sockpath"
+fi
+
+rm -f .refs-before .refs-after
+
 if [ -e .banged ]; then
 	echo "$proj update succeeded - failure recovery" | mail -s "[$cfg_name] $proj update succeeded" "$mail,$cfg_admin"
 	rm .banged
-- 
2.11.4.GIT